A distinction between ancient Wen state and ancient Su state is imperative in studying the territory and boundary of ancient Su state.
研究古苏国地理及其疆域，应区别古温国与古苏国。
A distinction between ancient Wen state and ancient Su state is imperative in studying the territory and boundary of ancient Su state.
研究古苏国地理及其疆域，应区别古温国与古苏国。
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